Device to prevent repeated indication of weft exhaustion



Nov. 5, 1929. K. .1. UNWIN ET AL 1,734,963

DEVICE TO PREVENT REPEATED INDICATION OF WEFT EXHAUSTION Filed July 16. 1928 :Patented Nov. 5, 1929 irsj KENNETH J. U'NVTIZN .AN D HALTER H. \FIAKEFIELD,; OF WORCESTER; MASSACHUSETTS,

ASSIGNOBSV TO CROZ'EP TON & KNOWLES LOUIE/I XVQRKS, 0E VJORCESTER, MASSACHU- SETTS, A. GGRIEORATEQN QFIEASSACH'USETTS DEVICE TO PRE TVEN TV REPEATED INDICATION OF WEFT EXHAUSTION V. nppiication, filed July 16,

this invention relates to improveme s in weft replenishing mechanism-of the type op erating with a regularly moving transferrer having a weft detecting element mounted thereon and it is the; generalobject of the invention-to provide means for preventing a repeated indication of weft exhaustion on transferring picks lay means of an element which is moved and held in position to preventthe repeated indication;

In weft replenishing mechanisms oi the type shown inpatient to'Ryon 1,37 there is employed a regularly moving transf'crrcr arm having a weft detector moved into onr gagement with the yarn by movement of the transterrer each detecting beat of the 10cm. in later modifications ot the original Ryon constrnction there is employedan indieating plu'nger which remains in indicating position after being moved to such position or released to be moved to said-position by the wett detector.

W'l'rether the indicating; plunger be or" the type shown in the origin-al-Ryon patent or the later type it occasionally happens that on the beat of the loom when a hobbin is being transferred into the depleted shuttle the detector will operate to indicateso as to repeat the indication. A device to prevent such repeated indication is shown: in co-pending application- Ser. No. 293,014, filed by Kingand it is an important object 02% our present invention to providea mechanism operating to accomplish substantially thesame result achieved by the King construction but wherein the device which prevents the repeated indication may remain in preventing position an appreciable length of time to give more certainty to the operation thereof.

It is a morepartrcnzlar obiect ofourpresent invention to provide a friction d'evlce which will he moved from inactive topreventing position' by mechanism con-trolled by the incoming bobbin and; in further providing means such as friction to hold the device in preventing position until the transterrer arm has moved upwardly to a position where the released indicating plunger cannot actto initiate replenish merit.

With these and other objects inview whlch 1928'. Serial no. 233,220.

will appear as the description proceeds, our invention resides in the combination and arran ement of parts hereinafter described and rorth-in the claims.

In the accom anying drawinos, wherein a convenient embodimentof our invention is set forth,

Fig; l is a side elevation of a portion of a multicolor weft replenishing mocha sin having'our invent-ion appliedthereto and showing the preventingdevice in normal position to permit the first indication to initate replenishment, I z i Fig. 2 is a view simiiar to 1 but with the preventing device moved to operative position where it is efiective to prevent a. repeated indication, i

Fig. 3' isa horizontal section taken on line of Fig. '2', and Fig. 4 is a vertical section taken on line 4- 1- of Fig.

Referring to the drawings, we have indicated-a loom frame 10 and a weft replenish- 16 fixed to the frame 11 and has at the lower end thereof an upwardly' and forwardly inclined cam face 17 whichcooperates at the time of indication with a plunger 18 slidably mounted on the transterrer arm, 12.

By reference to the previously identified patents the manner of controlling the plunger 18: will be understood and it is'suflicient for the purposes of our present invention to state that undfer-norm-alconditions said plunger is in the full line position shown at the lower part of Fig. 3, orin nou-indicating or inner position, and that at the time of indication of weft exhaustion. the. detector 19, the lower end of which is shown in Fig. 1, will actso as to result in movement of the plunger 18 to the dotted line position shown at A in Fig. 3.

' \Vhen in this position the plunger will act on the cam face 17 to rock the indicating lever in a clockwise direction as viewed in Fig. 1 when the transferrer arm is raised.

The indicating lever is provided with a horizontally extending arm 20 which is operatively connected by means of an upwardly extending link 21 to a color slide indicated generally at C and slidable back and forth in fixed bearings 22. Said color slide is also angularly movable in the bearings and is moved by mechanism not shown but acting in time with the shuttle boxes of the loom to .have operative relation with one or another of the vertical slides 23. V

I In the operation of the structure thus far described the transferrer arm will move up and down for a complete cycle of movement every alternate pick of the loom, and when suflicient weft is present the plunger 18 will be in non-indicating position, so that on the first part of the upward movement of the figure. This last described movement of the indicating lever 15 takes place on every nondetecting beat of the loom and acts to rock color slide C.

When the weft in the active shuttle is sub-- stantially exhausted, however,the plunger 18 will move to the dotted line position A shown in Fig. 3 and upon upward movement of the transferrer arm the indicating lever will move in the righthand direction to cause rocking of the color slide in a direction opposite to that which takes place on non-detecting beats of the loom. For a further description of the controlling devices between .the indicating lever 15 and the weft replenishing mechanism reference may be had to the previously mentioned. patent to Ryon In carrying our present invention into effect we provide means to prevent movement of the plunger 18 into operative indicating relationship with the indicating lever 15 at the time a fresh bobbin is being inserted into the shuttle S. \Vere this not accomplished it would be possible for said indicating plunger tocause a repeated actuation of the indicating lever so as to call for a second transfer which would be unnecessary. and if repeated a sufficient number of times would exhaust the supply of reserve bobbins.

Accordingly, in carrying our invention into effect we provide a fixed stud secured to the frame 11 preferably at a point located to the rear of the indicating lever 15. The stud 50 is secured in a hub 51 which may be cast integral with the frame 11 and there is mounted on said hub a compression spring 52 which 7 lies between the hub 53 of a preventer member 54 and a washer 55 positioned on the stud by a cotter pin 56. The compression spring 52 forces the hub-53 against the hub 51 and tends to hold the preventer member 54 in whatever position it may occupy relatively to the stud and frame.

The forward end of the preventer member 54 is provided with a wing 57 which, as shown in Fig. '4, has the outer or right hand vertical face 58 thereof somewhat to the right of the corresponding face 59 which is formed on the indicator lever 15 and lies adjacent the frame 11. The wing 57, as shown in Fig. 1, is normally in low position where it does not interfere with the longitudinal movementof the indicating plunger 18. r

The rear support for the butt of the bobbin is indicated at 60 and is secured to a'stud 61 by means of a set screw 62. Said stud 61 extends through and is rotatable in the frame 11 and through a hub 63 formed as part of the frame and has adjustably secured thereto an operating finger 64 held in adjusted longitudinal and angular position relatively to the stud by a set screw 64. Said operating finger extends rearwardly and is held against a fixed stop 65 by means of a torsion spring 66 one end of which passes under the stop 65 and the other end of which is -wrapped around the hub 63 and then extends over the operating finger 64. The spring 66 therefore acts to hold the rear bobbin butt support 60 yieldingly in bobbin retaining position.

A- coupling member 70 is provided with slot 71 through which extends a securing screw 72 extending into the preventer member 54. The upper end of the coupling extends horizontally as at 7 3 over the finger 64. The coupling may be adjusted both angularly and transversely with respect to the preventer member, but is normally held fixed to the latter so as to cause movement thereof when lifted by the finger 64.

the magazine into the shuttle S by the trans ferrer arm the support 60 will rock about its axis in a clockwise direction as viewed in Fig. 1, causing the operating finger 64 to move away from the stop 65 to the position shown in dotted lines in Fig. 2. This movement on the part of the operating finger raises the coupling 7 O and therefore lifts the preventer member from the position shown in Fig. 1 to that shown in Fig. 2.

By referring to Fig. 2 it will be seen that the Wing 57 is aligned with the plunger 18 and therefore should the detector 19 give a false indication said plunger will not be able ins to establish indicating operative relationship with the indicating lever 15. Therefore, as the transferrer arm l2moves upwardly, the indicating plunger will remain at rest, and as the transferrer continues to ascend the plunger will engage the cam face formed on the indicating lever and shown more particularly in Fig. 4. Said cam 80 serves to reset the indicating plunger, in the manner set forth in patent to Ryon No. 1,369,473;

As the transferrer arm continues its upward movement the indicating lever will be moved as previously described to the dotted line position shown in F l, and as-it does so the cam face 17 will engage the upwardly and forwardly extending face 8l-of the wing 57 and move the latter downwardly to restore the preventer member to the normal position indicated in Fig. 1.

The preventer member. is required to be in elevated position for a very short time and for this reason the spring 52 can be light and inasmuch as practically all of the weight of the preventer member is on one side of the supporting stud 50, said member will tend to move to its lowestposition due to vibration of the loom. Should it be desired to vary the extent of movement of the wing 57 the screw 7 2 may be loosened andthe coupling 70 given the proper setting along the operating finger 64.

From the foregoing'it will be seen that we have provided means for holding a preventer member into the path of the indicating plunger in mechanisms of the type referred to, the effect of the preventer member being to restrain movement of the indicating plunger and hold the same against establishing indicating operative relationship with the indicating lever to prevent'a repetition of indications. device for accomplishing this result, which is shown herein as dependingupon friction to retain its various setting, is controlled by the outgoing bobbin. It will also be noted that the transferrer arm acting as is normal in motions of thistype swings the indicator lever to reset the preventer member to normal position. Furthermore, the coupling 70 is of sucha nature thatthe extent of movement of the wing 57 may be varied. It will also be noted that the face 58 of the wing 57 is nearer the plunger 18 than is the face 59 of the indicator lever 15, the effectof this relationship being that as the transferrer arm is elevated there will be no tendency for the plunger 18 when urged to move toward indicating position to engage androck the indicator lever.

liaving thus described our invention it will be seen that changes and modifications may be made therein by those skilledin the art without departing from the spirit and scope of the invention and We do not wish to It will further be seen that the be limited'to thedetailsherein disclosed, but what we claim is: H r v 1; In. a weftreplenishing mechanism, a regularly moving transferrer arm having transferring and non-transferring; strokes, means to initiate replenishment atexhaustion of weft, an element movable atthe time of transfer; by a force derived from the transferrer arm to; a position to, prevent initiation of. weft replenishment, and means to hold said element in preventing position when the transferrer arm is moving on its nontransferring stroke.

2; In a weft replenishing mechanism, a regularly moving transferrer arm, means to initiate replenishment: at exhaustioniof weft, an element movable at the time of'transfer by a forcederived-from the transferrer arm to aflposit-ion to preventv initiation of weft rethe means to prevent the means from engag- U ing the indicating lever on a transferring beat of the loom, mechanism to move said element into. restraining position at. the time of'transfenandfa deviceto hold said means in restraining: position while the transferrer arm has a non-transferring stroke.

4. In a weft'replenishing mechanism, a regularly moving transferrer arm, an indicating lever, means carried by the transferrer arm to give the lever an indicating movement: at substantial weft. exhaustionv to V initiate weft replenishment, an element. movable into restraining position relatively to the means to prevent'the means from engaging the indicating lever on a transferringbeat of the loom,mechanism to move said element into restaining position at. the time. of transfer, anda device to holdsaid means in;re-

straining position after transfer.

5'; In. a weft replenishing mechanism having abobbin to be transferred, a movable sup.- portfor the bobbin when the latter is in trans:- fer position, means to transfer the bobbin, means to initiate weft replenishment at substantial exhaustion of weft, an element movable by the support at the time of transfer into restraining position relatively tothe means to prevent initiation of, weft replenishment at the. time of transfer,,and means to hold said element in restraining position after transfer. I V

6. In a weft replenishing mechanism, a transferrer arm having a regular movement, an indicating member mounted on the trans- .ferrer arm and movable into indicating po- 60 V Y Y replenishment by motion derived from the sition at the time of weft exhaustion, an indicating lever to cooperate with the member to initiate weft replenishment, and means independent of the lever and movable by a force derived from the transferrer arm at thetime of transfer into restraining position relatively to the member to prevent the latter from moving into indicating relationship relatively to the indicating lever. 7. In a weft replenishing mechanism, a transferrer arm having a regular movement, an indicating member mounted on the transferrer arm and movable into indicating posi tion at the time of weft exhaustion, an indieating lever to cooperate with the member to initiate weft replenishment, means independent of the lever and movable by a force derived from the transferrer arm at the time of transfer into restraining position relatively to the member to prevent the latter from moving into indicating relationship relatively to the indicating lever, and friction means acting on the restraining means to hold the same in restraining-position relatively to the member after transfer.

8. In a weft replenishing 100111, a regularly L moving transferrer arm, an indicating member movable to initiate replenishment of weft, an element carried by the transferrer. arm and movable at weft exhaustion into indicating relationship with the member to cause the latter to initiate weft replenishment, and means independent ofhthe indicating member and movable by aforce derived from the transferrer arm into restraining position relatively to the element to prevent the latter from establishing-indicating relationship with the member on transferring beats of the loom; 7 1 *9.-In a weft replenishing loom, a regularly moving transferrer arm, anindicating lever movable to initiate weft replenishment, a plunger movable with the transferrer arm and into indicating relationship with the indicating. lever at exhaustion of weft, an arm mounted on the loom independently of the indicating lever, and means acting at the time ofltransfer to move said arm into position to prevent the plunger from establishing indicating relationship with the indicator lever and thereby prevent initation of weft replenishment on transferring picks of the loom. V i 10. In a weft replenishing loom, a regularly moving trnsferrer arm having transferring and non-transferring strokes, an'indicating plunger'movable with the transferrer arm, an indicator lever to haveindicating relationship with the plunger at the time of weft exhaustion to initiate weft transferrer arm, a pivoted element mounted independently of the indicating lever and movable by a force derived from atransferrer arm into position to prevent indicatby the transferrer arm, a restraining element I forthe member movable into restraining position relatively to said member to prevent initiation of weft change during the transferring stroke of the transferrer arm, and means operative by the transferrer arm during the non-transferring stroke of said arm to move the element out of restraining position relatively to the member. 7

12. In a weft replenishing loom, a regu-' ularly moving transferrer arm, a plunger slidably mounted thereon and'carried there by, an indicating lever to have indicating relationship with said plunger at substantial exhaustion of weft to cause indicating movement of the lever by the transferrer arm to initiate weft replenishment, an arm pivotally mounted on the loom independently of the indicating lever, a support for a bobbin intransfer position, connections between the support and the arm to move the latter into restraining position with respect to the plunger on transferring beats of the loom to prevent said plunger from establishing indicating relationship with the indicator lever, friction means to hold said element in restraining position, and means operative by the transferrer arm to move said element out of restraining position with respect to the plunger. V

13. In a weft replenishing loom, a regu larly moving transferrer arm, a plunger slidably mounted thereonand carried thereby, an indicating lever to have indicating relationship with said plunger at substantial exhaustion of weft to cause indicatingm'ovement of the lever by the transferrer arm to initiate Weft replenishment, an arm pivotally mounted on the loom independently of the indicating lever, a support for a bobbin in I transfer position, connections between the support and the arm to move the latter into restraining position with respect to the plunger on transferring beats of the loom to prevent said plunger from establishing indicating relationship with the indicator lever, friction means to hold said element .in restraining position, and means operative by the transferrer arm to move said element out of restraining position with respect to the plunger, the plvot of said arm being eccentric with respect to the pivot f the indicating lever.

r 14. In a weft replenishing loom, a regularly moving transferrer arm having transferring and non-transferring strokes, an element carried by the transferrer arm and movable at Weft exhaustion to indicating position, means to prevent said element from moving to indicating position on transfer-'- ring beats of the loom, and mechanism 013- erative by a non-transferring stroke of a transferrer arm to reset said means.

In testimony whereof We have hereunto affixed our signatures.

KENNETH J. UNWIN. WALTER H. WAKEFIELD. 

